#include<iostream>
using namespace std;
struct A
{
	float a;
	char b;
	int ans[3];
}a;

int fun(int a, int b)
{
	if (a == 1)return 1;
	cout << "a==  " << a << endl;
	cout << "b==  " << b << endl;
	return 5 * fun(a - 1, b) % b;
}
int main()
{
	//cout << sizeof(a) << endl;
	cout << fun(23, 23) << endl;
	return 0;
}

int main()
{
	return 0;
}